16.4 Sharpening and Balancing a
Metal Cutting Attachment
Correctly sharpening and balancing metal cutting
attachments requires a lot of practice.
STIHL recommends you have metal cutting
attachments resharpened and balanced by a
STIHL servicing dealer.
17 Repairing
17.1 Repairing the Trimmer and
Cutting Attachment
The trimmer and cutting attachment cannot be
repaired by the user.
► If the trimmer or cutting attachment is dam‐
aged: Do not use your trimmer or cutting
attachment and contact your STIHL servicing
dealer.
18 Troubleshooting
18.1 Troubleshooting Trimmer
Most malfunctions have the same causes.
► Perform the following operations:
► Clean the air filter.
► Clean or replace the spark plug.
► Carry out the standard setting.
► Adjust idle speed.
► Adjust carburetor for operation at high altitude.
► If the malfunction still exists: Take the action described in the following table.
Condition Cause Remedy
Engine does not
start.
Insufficient fuel in the
tank.
► Prepare fuel mix and refuel the trimmer.
Engine is flooded. ► Clear the combustion chamber.
Carburetor is too hot. ► Allow trimmer to cool down.
► Before starting the engine: Depress the manual fuel
pump bulb at least ten times.
Carburetor is iced up. ► Allow trimmer to warm up to +10°C.
Engine idles errati‐
cally.
Carburetor is iced up. ► Allow trimmer to warm up to +10°C.
Engine stops while
idling
Carburetor is iced up. ► Allow trimmer to warm up to +10°C.
18.2 Cleaning the Air Filter
► Shut off the engine.
► Depress the locking tab (1) and remove the fil‐
ter cover (2).
► Clean the area around the air filter (3) with a
damp cloth or a soft brush.
► Take out the air filter (3).
► Tap the air filter (3).
► If the air filter (3) is damaged: Install a new air
filter (3).
► Wash the air filter (3) in warm, soapy water.
► Rinse the air filter (3) under running water.
► Allow the air filter (3) to dry in the air.
► Evenly spread 5 ml two-stroke engine oil in the
air filter (3).
17 Repairing English
0458-733-0121-C 17
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